A.N A M E R I C A N N A T I O N A L S T A N D A R D
Stainless Steel Pipe
ANSIIASME B36.19M-1985
REAFFIRMED 1994
FOR CURRENT COMMlllEE PERSONNEL
PLEASE SEE ASME MANUAL A S 1 1
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STD-ASME B 3 b - L S M - E N G L L785 m 0757b70 Ob20888 088 m
Date of Issuance: November 29, 1985
This Standard will be revised when the Society approves the issuance of a new edition.
There will be no addenda or written interpretations of the requirements of this Standard
issued to this Edition.
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Copyright O 1985 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All Rights Reserved
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FOREWORD
(This Foreword is not part of ANSUASME 836.19M-1985.)
This Standard for corrosion resistant piping, designated categorically as stainless, is
based on the same principles that formed the background for the development of ANSI/
ASME B36.10M, Welded and Seamless Wrought Steel Pipe, and reference is made to this
source of information.
The wall thicknesses shown for Schedules 40s and 80s are identical with those of Sched-
ules 40 and 80 in ANSVASME B36.10M except in the 12 in. size in Schedule 40s and the 10
in. and 12 in. sizes in Schedule 80s. The thickness for these three sizes corresponds to wall
thicknesses of Standard wall and Extra-Strong wall.
The more recent development of the highly alloyed stainless steels has brought about a
minor conflict with convention. With these newer materials, the need for standards is just as
great and the present types of threads are just as satisfactory, but the basic cost of the metal
is much higher and the art of fusion welding has developed concurrently. The character of
stainless steel permits the design of thin-wall piping systems without fear of early failure due
to corrosion, and the use of fusion welding to join such piping has eliminated the necessity
of threading it. For these reasons, the wall thickness dimensions shown under Schedule 10s
have been developed, based on the conventional formula, but then modified to correspond
to the nearest Birmingham Wire Gage (B.W.G.) number.
Following publication of the 1949 edition there developed a demand for a still lighter wall
pipe. A Schedule 5s was determined cooperatively by representatives of chemical compan-
ies, processing industries, and manufacturers of welding fittings. This was endorsed by the
ASA Chemical Industry Correlating Committee and the Manufacturers Standardization
Society of the Valve and Fittings Industry. The new schedule was included in the revised
standard which was approved by ASA (now ANSI) on April 7, 1952.
In 1956 it was recommended that the wall thickness of 12 in. 5s be lessened, and a new re-
vision of the standard was issued shortly after its approval by ASA (now ANSI) on Febru-
ary 27, 1957. In this fourth edition, dimensions were expanded beyond 12 in. pipe size by
inclusion of, and reference to, ASTM Specification A 409. This revision was approved by
ASA (now ANSI) on October 29, 1965.
The B36 Standards Committee membership was asked in March 1970 for recommenda-
tions as to what action should be taken on ANSI B36.19-1965 since, accordingto ANSI pro-
cedures, this standard was due for revision or reaffirmation. The B36 Standards Committee
recommended reaffirmation. This action was approved by the Secretariat and by the Amer-
ican National Standards Institute on May 26, 1971.
In 1975 the B36 Standards Committee undertook a review of the standard, considering its
acceptability and usefulness. The results were favorable; some editorial refinements and
updating were proposed along with the incorporation of factors for conversion to S1 (met-
ric) units. The revision was approved by the Standards Committee, the Secretariat, and sub-
sequently the American National Standards Institute on October 4, 1976.
This standard was revised in 1984 to include S1 metric dimensions. The outside diameter
and wall thicknesses were converted to millimeters by multiplying the inch dimensions by
25.4. Outside diameters larger than 16 in. were rounded to the nearest 1 mm, and outside
iii
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diameters 16 in. and smaller were rounded to the nearest 0.1 mm. Wall thicknesses were
rounded to the nearest 0.01 mm. These converted and rounded SI metric dimensions were
added in Table 2A. A formula to calculate the SI metric plain end mass, kg/m, using SI met-
ric diameters and thicknesses, was added to Section 5 . The SI metric plain end mass was cal-
culated for each size and thickness, and added in Table 3A.
These changes in the standard were approved by the Standards Committee, the Sponsor,
and the American National Standards Institute, and it was designated an American
National Standard on October 7, 1985.
iv
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STDOASME B3b.LSM-ENGL L785 0757b70 Ob2089L b 7 2 m
ASME STANDARDS COMMITTEE B36
Standardization of Wrought Steel Pipe
(The following is the roster of the Committee at the time of approval of this Standard.)
OFFICERS
F. G. Doar, Chairmen
W. R. Daisak, Secretary
COMMITTEE PERSONNEL
AMERICAN BUREAU OF SHIPPING
J. Tlratto. American Bureau of Shipping, New York, New York
AMERICAN GAS ASSOCIATION, INC.
R. Jackson, Northwest Central Pipeline Corp., Oklahoma City, Oklahoma
L. T. Ingds, Alternate, American Gas Association, Inc., Arlington, Virginia
AMERICAN IRON AND STEEL INSTITUTE
R. P. Stripay, United States Steel Corp., Pittsburgh, Pennsylvania
ELECTRIC LIGHT AND POWER GROUP
F. G. Doar, Southern Company Services Inc., Birmingham, Alabama
J. P. Markey. Alternate, Edison Electric Institute, Washington, D.C.
MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS
INDUSTRY
R. A. Schmktt. Ladish Co., Cudahy, Wisconsin
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA
J. H. Zink, Heat & Power Corp., Baltimore, Maryland
OIL COMPANIES MATERIALS ASSOCIATION
J. W. Strawson, Liaison, Engineer Equipment & Material Users Association,
London, England
PIPE FABRICATION INSTITUTE
J. S. Cole, ITT Grinnell Industrial Piping Inc., Kernersville, North Carolina
V
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STD-ASME B3b-LSM-ENGL L985 O759b70 Ob20672 507
CONTENTS
...
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Standards Committee Roster. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4 Permissible Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
5 eights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
6 PipeThreads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
7 Wall Thickness Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Tables
1 Specifications for Pipe With ASTM Designations and Titles of Standard
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Dimensions of Welded and Seamless Stainless Steel Pipe . Customary
Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2A Dimensions of Welded and Seamless Stainless Steel Pipe . SI Units . . . . . . . . 4
3 Nominal Weights of Steel Pipe, Plain Ends - Customary Units . . . . . . . . . . . . 5
3A Nominal Weights of Steel Pipe, Plain Ends - SI Units . . . . . . . . . . . . . . . . . . . 6
vii
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ANSVASME 836.1 SM-1 985
AN AMERICAN NATIONAL STANDARD
AN AMERICAN NATIONAL STANDARD
STAINLESS STEEL PIPE
1 SCOPE
This Standard covers the standardization of dimen-
sions of welded and seamless wrought stainless steel
pipe.
The word pipe is used as distinguished from tube to
apply to tubular products of dimensions commonly
used for pipeline and piping systems. Pipe dimensions
of sizes 12 and smaller have outside diameters numeri-
cally larger than the corresponding size. In contrast,
the outside diameters of tubes are numerically identi-
cal to the size number for all sizes.
The wall thicknesses for sizes 14 through 22 inclu-
sive of Schedule los, for size 12 of Schedule 40S, and
for sizes 10 and 12 of Schedule 80s are not the same as
those of ANSVASME B36.1OM. The s u f f i “S” in
the Schedule Number is used to differentiate B36.19M
pipe from B36.10M pipe. ANSVASME B36.10M in-
cludes other pipe thicknesses which are also commer-
cially available with stainless steel material.
2 SIZE
The size of all pipe in Tables 2 through 3A is identi-
fied by the nominal pipe size.
The manufacture of pipe in the inch nominal sizes
of Ys-12 inclusive is based on a standardized outside
diameter (O.D.). This O.D. was originally selected so
that pipe with a standard O.D. and having a wall
thickness which was typical of the period would have
an inside diameter (I.D.) approximately equal to the
nominal size. Although there is no such relation be-
tween the existing standard thicknesses - O.D. and
nominal size - these nominal sizes and standard
O.D.’s continue in use as “standard.”
The manufacture of pipe in nominal sizes of 14 and
larger proceeds on the basis of an O.D. corresponding
to the nominal size.
3 MATERIALS
The dimensional standards for pipe described here
are for products covered in the ASTM specifications
listed in Table 1.
4 PERMISSIBLE VARIATIONS
Variations in dimensions differ depending upon the
method of manufacture employed in making the pipe
to the various specifications listed in Table l. Permis-
sible variations for dimensions are indicated in each
specification.
5 WEIGHTS
The nominal weights’ of steel pipe are calculated
values and are tabulated in Table 3. The nominal plain
end weight, lb/ft, is calculated using the following
formula:
where
Wpe =
D =
r =
nominal plain end weight rounded to the
nearest 0.01 lb/ft
outside diameter to the nearest 0.001 in. (The
symbol D is to be used for O.D. only in math-
ematical equations or formulas.)
specified wall thickness rounded to the near-
est 0.001 in.
The nominal plain end mass, kg/m, is calculated
using the following formula:
WPe = 0.02466(0 - t) t
‘The different grades of stainless steel have different specific densi-
ties and hence may weigh more or less than the values listed in this
table would indicate [see Table 3 , General Note (c)].
I
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ANSVASME 836.1 9M-1985
AN AMERICAN NATIONAL STANDARD STAINLESS STEEL PIPE
TABLE 1 SPECIFICATIONS FOR PIPE WITH ASTM DESIGNATIONS AND
TITLES OF STANDARD SPECIFICATIONS
ASTM
Designation Title
A 312 Specification for Seamless and Welded Austenitic Stainless Steel Pipe
A 358 Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy
Steel Pipe for High-Temperature Service
A 376 Specification for Seamless Austenitic Steel Pipe for High-Temperature
Central-Station Service
A 409 Specification for Welded Large Diameter Austenitic Steel Pipe for Corro-
sive or High-Temperature Service
where
Wpe = nominal plain end mass rounded to the near-
est 0.01 kg/m
D = outside diameter to the nearest 0.1 mm for
outside diameters which are 16 in. and
smaller and 1.0 mm for outside diameters
larger than 16 in. (The symbol D is to be used
for O.D. only in mathematical equations or
formulas.)
t = specified wall thickness rounded to the near-
est 0.01 mm
NOTE: 1 in. = 25.4 mm; 1 lb/ft = 1.4895 kg/m
6 PIPE THREADS
Unless otherwise specified, the threads of threaded
pipe shall conform to ANSVASME B1.20.1, Pipe
Threads, General Purpose (Inch).
Schedules 5s and 10s wall thicknesses do not permit
threading in accordance with ANSUASME B1.20.1.
7 WALL THICKNESS SELECTION
When the selection of wall thickness depends pri-
marily upon capacity to resist internal pressure under
given conditions, the designer shall compute the exact
value of wall thickness suitable for conditions for
which the pipe is required as prescribed in detail in the
ASME Boiler and Pressure Vessel Code, ANSI/
ASME B3 1 Code for Pressure Piping, or other similar
codes, whichever governs the construction. A thick-
ness will then be selected from the schedules of nomi-
nal thickness contained in Tables 2 and 2A to suit the
value computed to fulfill the conditions for which the
pipe is desired.
2
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STAINLESS STEEL PIPE
ANSIIASME'636.19M-1986
AN AMERICAN NATIONAL STANDARD
TABLE 2 DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL
PIPE - CUSTOMARY UNITS
inch
Nominal Outside
Nominal Wall Thickness, in.
p ipe ' Diameter. Schedule Schedule Schedule Schedule
Size in. 5s (1) 10s (1) 40s BOS
' la
'14
7.9
v 2
3l4
1
1 '14
1 '12
2
2 'h
3
3%
4
5
6
8
10
12
14
16
18
20
22
24
30
0.405
O. 540
0.675
0.840
1 .O50
1.31 5
1.660
1 .goo
2.375
2.875
3.500
4.000
4.500
5.563
6.625
8.625
10.750
12.750
14.000
16.000
18.000
20.000
22.000
24.000
30.000
, . .
. .